Kenny Chesney fans at a recent Red Rock Ampitheatre show got a nice surprise when the singer brought Grace Potter to the stage for a live version of their hit duet 'You and Tequilla.' It turns out the tape was rolling that night in Colorado, and Chesney has just made their performance available to radio station across the country.

Potter enters the stage to an enthusiastic applause from Chesney fans. "For all you people out there that have that somebody in your life that you know is not really good for ya," Chesney says, "but you keep going back. This is for you." The two sound as comfortable in front of 20,000 screaming fans as they do on the studio version of the Top 5 and climbing hit

'You and Tequilla' was recently nominated for three 2011 CMA Awards, including Song of the Year, Musical Event of the Year and Music Video of the Year. Until teaming up with Chesney, Potter was not well known in country music circles. She is the lead singer of Grace Potter and the Nocturnals, a rock band out of Vermont that's opened for Dave Matthews and performed on numerous television talk shows. The song is on its way to becoming the fourth straight No. 1 hit from Chesney's 'Hemingway's Whiskey' album.

Listen to the Live Version of 'You and Tequilla'